
Update event listener so it works with elements that have listeners attached from multiple sources (i.e. closure and GWT) in IE.

R=arv,pupius
DELTA=12  (8 added, 1 deleted, 3 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=1052011


git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@404 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

mdavid/closure-library,Kuniwak/google-closure-library-jsdoc,neilrahilly/closure-library,KgDesignes/closure-library,neilrahilly/closure-library,mdavid/closure-library,KgDesignes/closure-library,homer6/google-closure-library,thinkfuse/google-closure,prop/closure-library,jarib/google-closure-library,thinkfuse/google-closure,mdavid/closure-library,homer6/google-closure-library,knutwalker/google-closure-library,prop/closure-library,rethinkdb/google-closure-library,rethinkdb/google-closure-library,thinkfuse/google-closure,prop/closure-library,jarib/google-closure-library,rethinkdb/google-closure-library,knutwalker/google-closure-library,KgDesignes/closure-library,homer6/google-closure-library,Kuniwak/google-closure-library-jsdoc,neilrahilly/closure-library